Before doing the electronic laryngoscopy need to spray anesthetic, spray anesthetic mainly to reduce the degree of sensitivity of the patient’s pharyngeal mucosa, to reduce the symptoms of nausea. If the electronic laryngoscope is entered from the nose, you need to spray a certain amount of anesthetic inside the nose, which can reduce the pain. If the patient enters directly from the mouth, it can be sprayed directly into the throat. After spraying, patients need to gargle in the mouth for 5 minutes to give full play to the effect of the drug, then you can perform the electronic laryngoscopy, the normal spray within 2 hours after the drug can not eat, drink water, so as not to cause obvious choking and coughing, it is recommended that after the examination to clarify their condition, while further symptomatic treatment.